From: Jeff Layton <jlayton@kernel.org>
To: Christian Brauner <brauner@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Chuck Lever <chuck.lever@oracle.com>,
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Cc: David Laight <david.laight.linux@gmail.com>,
Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@infradead.org>,
linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-ext4@vger.kernel.org, linux-erofs@lists.ozlabs.org,
linux-xfs@vger.kernel.org, ceph-devel@vger.kernel.org,
linux-btrfs@vger.kernel.org, linux-cifs@vger.kernel.org,
samba-technical@lists.samba.org, linux-unionfs@vger.kernel.org,
devel@lists.orangefs.org, ocfs2-devel@lists.linux.dev,
ntfs3@lists.linux.dev, linux-nilfs@vger.kernel.org,
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linux-mtd@lists.infradead.org, gfs2@lists.linux.dev,
linux-f2fs-devel@lists.sourceforge.net,
linux-doc@vger.kernel.org, Jeff Layton <jlayton@kernel.org>
Subject: [PATCH v2 01/31] Documentation: document EXPORT_OP_NOLOCKS
Date: Mon, 19 Jan 2026 11:26:18 -0500 [thread overview]
Message-ID: <20260119-exportfs-nfsd-v2-1-d93368f903bd@kernel.org> (raw)
In-Reply-To: <20260119-exportfs-nfsd-v2-0-d93368f903bd@kernel.org>
This got missed when the flag was added. Document it properly.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
Documentation/filesystems/nfs/exporting.rst | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/filesystems/nfs/exporting.rst b/Documentation/filesystems/nfs/exporting.rst
index de64d2d002a204c5460980c898d4ec41fd43d47a..0583a0516b1e3a3e6a10af95ff88506cf02f7df4 100644
--- a/Documentation/filesystems/nfs/exporting.rst
+++ b/Documentation/filesystems/nfs/exporting.rst
@@ -238,3 +238,9 @@ following flags are defined:
all of an inode's dirty data on last close. Exports that behave this
way should set EXPORT_OP_FLUSH_ON_CLOSE so that NFSD knows to skip
waiting for writeback when closing such files.
+
+ EXPORT_OP_NOLOCKS - Disable file locking on this filesystem. Some
+ filesystems cannot properly support file locking as implemented by
+ nfsd. A case in point is reexport of NFS itself, which can't be done
+ safely without coordinating the grace period handling. Other clustered
+ and networked filesystems can be problematic here as well.
--
2.52.0
next prev parent reply other threads:[~2026-01-19 16:27 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-19 16:26 [PATCH v2 00/31] fs: require filesystems to explicitly opt-in to nfsd export support Jeff Layton
2026-01-19 16:26 ` Jeff Layton [this message]
2026-01-20 7:44 ` [PATCH v2 01/31] Documentation: document EXPORT_OP_NOLOCKS Christoph Hellwig
2026-01-20 13:20 ` Jeff Layton
2026-01-20 14:12 ` Jeff Layton
2026-01-20 14:35 ` Jeff Layton
2026-01-21 9:17 ` Christoph Hellwig
2026-01-21 9:58 ` NeilBrown
2026-01-21 12:29 ` Jeff Layton
2026-01-21 22:47 ` NeilBrown
2026-01-19 16:26 ` [PATCH v2 02/31] exportfs: add new EXPORT_OP_STABLE_HANDLES flag Jeff Layton
2026-01-19 16:41 ` Amir Goldstein
2026-01-20 7:50 ` Christoph Hellwig
2026-01-20 8:40 ` Jan Kara
2026-01-21 9:17 ` Christoph Hellwig
2026-01-20 13:21 ` Jeff Layton
2026-01-19 16:26 ` [PATCH v2 03/31] tmpfs: add EXPORT_OP_STABLE_HANDLES flag to export operations Jeff Layton
2026-01-19 16:26 ` [PATCH v2 04/31] ext4: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 05/31] ext2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 06/31] erofs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 07/31] efs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 08/31] xfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 09/31] ceph: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 10/31] btrfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 11/31] befs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 12/31] ufs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 13/31] udf: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 14/31] affs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 15/31] squashfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 16/31] smb/client: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 17/31] ovl: " Jeff Layton
2026-01-19 16:42 ` Amir Goldstein
2026-01-19 16:26 ` [PATCH v2 18/31] orangefs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 19/31] ocfs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 20/31] ntfs3: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 21/31] nilfs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 22/31] nfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 23/31] jfs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 24/31] jffs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 25/31] isofs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 26/31] gfs2: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 27/31] fuse: " Jeff Layton
2026-01-19 16:43 ` Amir Goldstein
2026-01-19 16:26 ` [PATCH v2 28/31] fat: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 29/31] f2fs: " Jeff Layton
2026-01-19 16:26 ` [PATCH v2 30/31] nfsd: only allow filesystems that set EXPORT_OP_STABLE_HANDLES Jeff Layton
2026-01-19 16:51 ` Chuck Lever
2026-01-19 16:26 ` [PATCH v2 31/31] nfsd: convert dprintks in check_export() to tracepoints Jeff Layton
2026-01-19 16:47 ` Chuck Lever
2026-01-20 13:42 ` Jeff Layton
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